cve.bz

CVE-2026-25587

10.0 criticalEPSS 0.7%

Critical (10.0) in nyariv sandboxjs. EPSS 0.7% chance of exploitation in the next 30 days. Fixed in @nyariv/sandboxjs 0.8.29.

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, as Map is in SAFE_PROTOYPES, it's prototype can be obtained via Map.prototype. By overwriting Map.prototype.has the sandbox can be escaped. This vulnerability is fixed in 0.8.29.

Severity

CVSS 3.1

10.0 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS
0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
CWE
CWE-94
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-66h4-qj4x-38xpnpm@nyariv/sandboxjs<0.8.290.8.29

References

Check your stackJSON